Grouting pressure in Tutorial 6 of Plaxis 2D

Dear Nadeem,

The value used in the tutorial example is taking into consideration the fact that one should prevent having the following situations:

• Crown should not collapse or blow out
• The sides should not blow out horizontally

Concerning these, you can calculate the value based on the vertical and horizontal stresses around your tunnel and make sure to apply about the same value as grout pressure.

Note that the exact value depends on the deformation pattern and settlement requirements at the soil surface, so then one can increase/decrease the grout pressure.

Dear Nadeem,

The value used in the tutorial example is taking into consideration the fact that one should prevent having the following situations:

• Crown should not collapse or blow out
• The sides should not blow out horizontally

Concerning these, you can calculate the value based on the vertical and horizontal stresses around your tunnel and make sure to apply about the same value as grout pressure.

Note that the exact value depends on the deformation pattern and settlement requirements at the soil surface, so then one can increase/decrease the grout pressure.